Finding the Fourth Proportional to 3,936.72, 5,432.76 and 2,168.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.72 : 5,432.76 = 2,168.43 : x
2. Step 2: Convert to fraction form
   3,936.72/5,432.76 = 2,168.43/x
3. Step 3: Cross multiply
   3,936.72x = 5,432.76 × 2,168.43
4. Step 4: Simplify right side
   3,936.72x = 11,780,559.77
5. Step 5: Solve for x
   x = 11,780,559.77/3,936.72
6. Step 6: Final answer
   x = 2,992.48